java设计模式--享元模式

//享元类抽象
public interface FlyWeight {
    
    void setColor(String color);
    
    String getColor();
    
    void diplay(Waibu c);
    

}

//内部，可以共享的分离出来，引用外部不可以共享的
class Neibu implements FlyWeight{
    
    private String color;
    
    public Neibu(String color) {
        this.color = color;
    }

    public void setColor(String color) {
        this.color = color;
        
    }

    public String getColor() {
        return color;
    }

    public void diplay(Waibu c) {
        System.out.println("棋子颜色"+color);
        System.out.println("棋子为止"+c.getX()+":"+c.getY());
        
    }
    
}

//外部，不可以共享的分离出来
class Waibu{
    
    private String x;

    private String y;
    
    public Waibu(String x, String y) {
        this.x = x;
        this.y = y;
    }

    public String getX() {
        return x;
    }

    public void setX(String x) {
        this.x = x;
    }

    public String getY() {
        return y;
    }

    public void setY(String y) {
        this.y = y;
    }

//享元工厂
public class FlyWeightFactory {
    
    private static Map<String, FlyWeight> map = new HashMap<String, FlyWeight>();
    
    public static FlyWeight get(String color){
        if(map.get(color)!=null){
            return map.get(color);
        }else{
            FlyWeight flyWeight = new Neibu(color);
            map.put(color, flyWeight);
            return flyWeight;
        }
        
    }
    
}

public static void main(String[] args) {
        FlyWeight f1 = FlyWeightFactory.get("白色");
        FlyWeight f2 = FlyWeightFactory.get("白色");
        f1.diplay(new Waibu("25", "25"));
        f2.diplay(new Waibu("50", "50"));
    }